Explain how the terms diploid and haploid relate to human chromosome number in both autosomes and sex cells.What will be an ideal response?
ANSWER: Humans have 46 chromosomes that exist in pairs, with most cells having 23 homologous
pairs, or 46 chromosomes. This is the diploid, or 2n, number of chromosomes. One member
of each homologous pair is contributed by each parent. Certain cells, such as eggs and sperm
(gametes), contain only one copy of each chromosome. These cells have 23 chromosomes,
which is the haploid, or n, number of chromosomes.
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Maurice Wilkins and Rosalind Franklin obtained X-ray diffraction photographs that indicted that DNA has a ____________________ shape with a constant diameter
Fill in the blank(s) with correct word
With __________, an animal stops responding to an
ongoing stimulus. Fill in the blank(s) with the appropriate word(s).
What part of the blastocyst will develop into the human embryo and eventually into a fetus?
A. archenteron B. inner cell mass C. chorion D. blastopore E. trophoblast
From the list below, which choice represents a correct difference between sperm production and egg production?
A) Four mature sperm are produced from one cell; one large egg is produced from one cell. B) Sperm are produced by somatic (body) cells; eggs are produced by gametes. C) Sperm are produced by mitosis; eggs are produced by meiosis. D) Sperm are produced by meiosis; eggs are produced by mitosis. E) Eight mature sperm are produced from one cell; two eggs are produced from one cell.